It can be done, BUT it will take a lot of time and training. First of all , if you're just aquiring this dog, at 8 months old, it is in full jerky teenager mode. Just keep that in mind. I lost several chickens to my male Anatolian when he was 4- 11 months. He won't touch them now, but poultry is the hardest thing for them to leave alone.
The dog needs to be penned within sight and scent of the birds, but not in with them. Take him in with the birds on a long lead several times a day so you can correct any unwanted behavior. Inappropriate responses are ; staring at stock, ears up, chasing, pawing at them. You want him to basically ignore them, walking calmly and slowly, ears back, no darting around or trying to play with them. Try this FB group also: learning about LGDs.